Chair frame



FIG. 1 is a front perspective view of a chair frame showing my new design;

FIG. 2 is a rear perspective view;

FIG. 3 is a right side elevational view on a reduced scale;

FIG. 4 is a rear elevational view on a scale similar to FIG. 3;

FIG. 5 is a front perspective view of a chair frame showing a second embodiment of my design;

FIG. 6 is a rear perspective view;

FIG. 7 is a right side elevational view on a reduced scale;

FIG. 8 is a rear elevational view on a scale similar to FIG. 7;

FIG. 9 is a front perspective view of a chair frame showing a third embodiment of my design;

FIG. 10 is a rear perspective view;

FIG. 11 is a right side elevational view on a reduced scale; and

FIG. 12 is a rear elevational view thereof on a scale similar to FIG. 11. 

The ornamental design for a chair frame, as shown and described. 